NEIGHBORHOOD PERCEPTION OF SAFETY AND THE MOBILITY GAP BETWEEN MEN AND WOMEN IN OLD AGE

Thesis (Master, Community Health & Epidemiology) -- Queen's University, 2016-10-02 21:02:07.735

Modifying the band gap and optical properties of Germanium nanowires by surface termination

Semiconductor nanowires, based on silicon (Si) or germanium (Ge) are leading candidates for many ICT applications, including next generation transistors, optoelectronics, gas and biosensing and photovoltaics. Key to these applications is the possibility to tune the band gap by changing the diameter of the nanowire. Ge nanowires of different diameter have been studied with H termination, but, using ideas from chemistry, changing the surface terminating group can be used to modulate the band gap. In this paper we apply the generalised gradient approximation of density functional theory (GGA-DFT) and hybrid DFT to study the effect of diameter and surface termination using –H, –NH2 and –OH groups on the band gap of (001), (110) and (111) oriented germanium nanowires. We show that the surface terminating group allows both the magnitude and the nature of the band gap to be changed. We further show that the absorption edge shifts to longer wavelength with the –NH2 and –OH terminations compared to the –H termination and we trace the origin of this effect to valence band modifications upon modifying the nanowire with –NH2 or –OH. These results show that it is possible to tune the band gap of small diameter Ge nanowires over a range of ca. 1.1 eV by simple surface chemistry.

Educación legal clínica y defensa de los derechos humanos : casos paradigmáticos del Grupo de Acciones Públicas –GAP–

...este libro es el resultado de la implementación de la educación legal clínica, evidenciando, de un lado, la importancia de involucrar en la formación de los estudiantes de Jurisprudencia el componente práctico, al llevar a escenarios reales la aplicación de los conocimientos adquiridos en su carrera, incluso en asuntos de orden transnacional, y de otro lado, la imperiosa necesidad de poner en marcha el ejercicio responsable de su profesión, comprometiéndose con la realidad social de nuestro país. Adicionalmente, este libro es una herramienta de aprendizaje para clínicas de interés público en formación, para universidades y organizaciones que buscan implementar la enseñanza clínica en sus programas, para las comunidades y sus líderes, y en general para quienes buscan la forma responsable de ayudar a la comunidad a partir de la aplicación de sus conocimientos jurídicos..."--presentación.

Effects of cAMP modulators during in vitro prematuration of bovine oocytes on gap junctional communication and embryo development potential.

2016

Avaliação, empregando simulação, da diferença na produtividade (yield gap) do milho em Minas Gerais.

2016